MULTIPLE MODULATED WAVELENGTHS IN SINGLE COMPACT LASER

摘要

PROBLEM TO BE SOLVED: To provide a compact and inexpensive light source provided with a capability to provide a plurality of modulated wavelengths in a CWDM (coarse wavelength division multiplexing) or DWDM (dense wavelength division multiplexing) optical communication system, which is required in an industrial world.

SOLUTION: A multiple wavelength output light source (110) is disclosed. The multiple wavelength output light source (110) comprises a laser device (210) having a plurality of output wavelengths (λ1to λ4), and a modulator (232, 234, 236 and 238) associated with and configured to modulate each wavelength (λ1to λ4) independently. The plurality of modulated wavelengths (λ1to λ4) λ can be separated (218) prior to modulating and then be combined (252), after modulation, onto a single optical fiber (104). The multiple modulated laser outputs can be used in a WDM (wavelength division multiplexing) or a DWDM optical communication system.

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